JP4078483B2 - Seismic reinforcement method for walls with firehead windows - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for seismic reinforcement of walls with firehead windows, and is mainly used for seismic reinforcement of existing temples and shrines.
[0002]
[Prior art]
In the case of ancient Japanese buildings such as temples and shrines, which are known as traditional wooden buildings, there are generally many walls on the north side behind the worship hall, almost no walls on the south side, windows and doorways. There are many examples. In addition, openings such as windows and doorways are formed in the shape of a firehead arch, particularly at the top of the opening, resembling the shape of a flame.
[0003]
[Problems to be solved by the invention]
However, in the case of a building with such an architectural style, because the wall is unevenly distributed on the north side, twisting occurs during earthquakes and strong winds due to the deviation of the center of gravity and rigid core of the building, and the south side frame with low rigidity There was a risk of significant deformation such as collapse due to significant deformation.
[0004]
Therefore, a method has been devised in which a seismic wall is newly placed on the south side without a wall to balance the north and south walls so as to eliminate eccentricity as much as possible. The expansion of the door not only blocked the opening and darkened the room, but also damaged the appearance of traditional Japanese temples and Buddhist temples.
[0005]
In addition, the openings such as windows and doorways of this type of building are formed in a special arch shape such as a firehead shape at the upper end, so that the corners of the opening are simply placed like a rectangular opening. Reinforcement, such as attaching fire-fired materials, could not cope, and development of new seismic reinforcement was desired.
[0006]
The invention of the present application was made to solve the above-mentioned problems. An earthquake-proof reinforcement method for a wall with a firehead window capable of extremely effective earthquake-proof reinforcement without impairing the appearance of a traditional Japanese ancient building. The purpose is to provide.
[0007]
[Means for Solving the Problems]
The method for seismic reinforcement of a wall with a firehead window according to claim 1 is the method of seismic reinforcement of a wall with a firehead window of an existing wooden structure, wherein the opening frame body of the existing firehead window and the surrounding wall of the opening frame body After removing the material, a reinforcing frame formed in an almost arch shape is installed in the shaft constituting the wall, and the lower end and the upper end of the reinforcing frame are fixed to the shaft respectively, and the reinforcement A window base and an upper window frame material are respectively attached to the inside of the frame body, and the opening frame body is newly attached between the window base and the upper window frame material. The reinforcing frame in this case can be formed of a wooden material (mainly laminated material) or a steel frame material such as H-shaped steel.
[0008]
The seismic strengthening structure for a wall with a firehead window according to claim 2 is the seismic strengthening structure according to claim 1, wherein the reinforcing frame includes a column member erected on both sides of the opening frame and an upper end portion of the column member. It is characterized in that it is formed in an approximately arch shape from a diagonal member installed between them. In this case, these members may be assembled one by one in the shaft assembly at the site, but can also be formed in a arch shape in advance at a factory or the like.
[0009]
The seismic reinforcement structure for a wall with a firehead window according to claim 3 is the seismic reinforcement structure according to claim 1 or 2, wherein arm members protrude from both sides of the reinforcement frame, and the tips thereof are joined to the shaft assembly. It is characterized by.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 and FIG. 2 show an example of the present invention. In the figure, a building frame is composed of a base 1, columns 2 and 2 built on the base 1, and a beam 3 bridged between the columns 2 and 2. 4, and a window frame body 5 of a firehead window is installed in the shaft assembly 4.
[0011]
Further, an earthquake-resistant reinforcing frame 6 (hereinafter referred to as “reinforcing frame 6”) is attached between the shaft assembly 4 and the window frame 5, and an earthquake-resistant reinforcing plate 7 (hereinafter referred to as “reinforcing plate 7”) is provided on the indoor side and the outdoor side. ”) And a wall finishing material 8 such as planking or plaster is attached thereon.
[0012]
The window frame 5 is formed of a lower frame 5a, eaves frames 5b and 5b built on both ends of the lower frame 5a, and an upper frame 5c installed between upper ends of the eaves frames 5b and 5b. The frame 5a is spanned between the left and right column members 6a, 6a of the reinforcing frame body 6, and the left and right collar frames 5b, 5b are formed in a shape that slightly bulges inside the window frame body 5 The frame 5c is shaped like a firehead arch to resemble the shape of a flame.
[0013]
The reinforcing frame 6 is a column material that is erected on the joint portion a between the base 1 and the left and right columns 2 and 2 along the flange frames 5b and 5b of the window frame 5 and slightly inclined toward the window frame 5 side. 6a, 6a, diagonal members 6b, 6b bridged in a mountain shape between the upper ends of the column members 6a, 6a, joints B of the column members 6a and diagonal members 6b, beams 3, and left and right columns 2 , 2 are formed in an approximately arch shape (gate shape) from the arm members 6c, 6c respectively spanned between the joint portions c.
[0014]
The joint portions B of the column member 6a, the diagonal member 6b, and the arm member 6c are reinforced in a rigid connection state by attaching gusset plates 9 to both the indoor side and the outdoor side or both sides, and the diagonal members 6b, 6b. The upper end portion of the beam 3 is fixed to the central portion of the beam 3 and the joint portion D is reinforced in a rigid joint state by attaching gusset plates 9 to both the indoor side and the outdoor side or one side. In addition, the joint part i of the base 1 and the column 2 and the joint part C of the column 2 and the beam 3 are similarly reinforced by the gusset plate 9.
[0015]
Each of the window frame 5 and the reinforcing frame 6 is made of wood, mainly laminated material, and the gusset plate 9 is made of a steel plate or the like. The reinforcing plate 7 is attached to both the indoor side and the outdoor side around the window frame 5, and a structural plywood is mainly used for the reinforcing plate 7.
[0016]
In the figure, reference numeral 10 denotes a window base that receives the window frame body 5 and is horizontally spanned between the left and right column members 6a and 6a, and reference numeral 11 denotes an upper frame member (lintel) of the window. It spans between the materials 6b, 6b, both are attached to this portion and installed to receive the reinforcing plate 7.
[0017]
Further, reference numeral 12a denotes a case edge member attached to the inside of the base 1, the left and right pillars 2 and the beam 3, and 12b denotes a saddle case edge erected between the base 1 and the window base 10 at predetermined intervals. These are materials and are attached as receiving materials for the reinforcing plate 7 and the wall finishing material 8. Furthermore, all of these members are generally nailed or bolted, and reinforcement hardware is used as necessary.
[0018]
In such a configuration, the construction method will be briefly described.
(1). First, the window frame 5 of the existing firehead window and the surrounding wall material were all removed, and the base 1 and the pillars 2 and 2 built on the base 1 and the pillars 2 and 2 were laid. Leave only beam 3. In addition, it corrects the tilt distortion, level, etc. of the building (shaft). In addition, anchoring and reinforcement will be newly performed using anchor bolts and reinforcing hardware.
(2). Next, the pre-assembled reinforcement frame 6 is built into the shaft assembly 4. The lower ends of the column members 6a and 6a are connected to the joint portion A of the base 1 and the column 2, the upper ends of the arm members 6c and 6c are connected to the joint portion B of the column 2 and the beam 3, and the diagonal member 6b. , 6b is fixed to the center of the beam 3 in a rigidly connected state.
(3). Next, the window base 10 and the window upper frame material 11 are respectively attached to the inside of the reinforcing frame body 6, and the window frame body 5 is newly attached between the window base 10 and the window upper frame material 11.
(4). Then, the reinforcing plates 7 are attached to the indoor side and the outdoor side around the window frame body 5, and the wall finish 8 is attached thereon to complete the seismic reinforcement.
[0019]
【The invention's effect】
The invention of the present application is as described above, and in particular, a reinforcing frame formed in an almost arch shape is attached around an opening frame formed in a firehead shape, and a lower end portion and an upper end portion thereof are attached to a shaft assembly. Since each frame is fixed, the frame around the opening frame is almost completely rigid, so that the walls with firehead-shaped openings can be seismically strengthened without damaging the appearance of traditional Japanese buildings. It can be done reliably.
[0020]
In addition, since the arm material protrudes on both sides of the reinforcing frame body and the tip portion is fixed to the shaft assembly, the seismic reinforcement is further enhanced.
[Brief description of the drawings]
FIG. 1 is a front view of a temple building.
FIG. 2A is a front view of a firehead-shaped window, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base 2 Pillar 3 Beam 4 Frame 5 Window frame body of a crater window 6 Reinforcement frame (seismic reinforcement frame)
7 Reinforcement plate (seismic reinforcement plate)
8 Wall finish 9 Gusset board 10 Window stand 11 Upper frame material
12a Border material
12b Body material

Claims (3)

In the seismic reinforcement method for walls with firehead windows of existing wooden structures, after removing the opening frame body of the existing firehead window and the wall material around the opening frame body, there is almost an arch in the frame constituting the wall. A reinforcing frame body formed in a shape, fixing a lower end portion and an upper end portion of the reinforcing frame body to the shaft assembly, and attaching a window base and an upper window frame material to the reinforcing frame body, A method for seismic reinforcement of a wall with a crater window, wherein the opening frame is newly attached between a base and a window frame material . 2. The reinforcing frame body is formed in a substantially arch shape from a pillar material provided upright on both sides of the opening frame body and an oblique material installed between upper ends of the pillar material. Seismic reinforcement method for walls with firehead windows. 3. The method for seismic reinforcement of a wall with a firehead window according to claim 1 or 2, wherein an arm material projects from both sides of the reinforcing frame and its tip is fixed to a shaft set.

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